Author Topic: 70-73 conversion advice  (Read 13128 times)

79_T/A_guy

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70-73 conversion advice
« on: January 21, 2012, 04:01:59 PM »
How well do the 70-73 fenders line up on a 77-78? I know that the early models have a different fender and hood and to get the front clip and hood I want I will have to replace the fenders. Im sure there are things that will have to be modified and so on. Im just curious about the lining up and fitment of the fenders. Any help would be great. Also Sorry if this has been asked alot I unfortunately dont seem to have the time to frequent here as much as I would like.

EDIT:

Ok so I edited the title to reflect the direction of my already made thread as not to add another thread while still being in the area of discussion of the last.

So Ive found a few options to go with this conversion. Buy and fix up genuine parts, use a fiberglass front clip, or using a complete fiberglass frontend.

Now I know I am wanting the double ram air hood so the full fiberglass frontend would have to have the hood cut out and have the new one installed. Im curious if anyone has used the full fiberglass front. I looked pretty thoroughly and have only found a few threads on the conversion that have depth and those still dont have much to them. Its clear its more simple then I originally thought however now its a simple matter of the best process, not the cheapest. I want something that flows seamlessly I also am not a master fiberglasser but am pretty darn decent with a mig unit and grinder.
« Last Edit: January 22, 2012, 10:40:05 PM by 79_T/A_guy »
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Aldo

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Re: Simple question for a complicated 70-73 front to fit on a 77-78
« Reply #1 on: January 21, 2012, 04:46:05 PM »
all the fenders through out the years 70to81 are the same outside more or less,small things changed like styling when hood was opened(inner parts along the splash gard wheel well).and 74 and under had a small bracket for the lower valance,but all the fenders would line up with the 70to73 front end,many people do this mod with only the front end stuff 70to73 and a hood,no need to replace your fenders.


79_T/A_guy

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Re: Simple question for a complicated 70-73 front to fit on a 77-78
« Reply #2 on: January 21, 2012, 04:50:43 PM »
really, thats very interesting I have heard several times that the older hoods dont line up with the later model fenders, and have also heard or well was under the impression that the early bumpers had larger gaps with the later fenders.

If that isnt the case that would be great to hear.
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Aldo

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Re: Simple question for a complicated 70-73 front to fit on a 77-78
« Reply #3 on: January 21, 2012, 04:56:00 PM »
well im no expert on this convertion,but i have a friend who lives in quebec and has an 80 TA with this convertion,he only replaced the front,and put a hood,nothing else,yes all the bracket to support the front you will need,,small list of parts,, nose,lights,grills,lower valance,turnsignal lights,hood with the shaker or not ram air as you wish,and thats it.


79_T/A_guy

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Re: Simple question for a complicated 70-73 front to fit on a 77-78
« Reply #4 on: January 21, 2012, 05:10:59 PM »
Well thats great to hear. I have read several places with no mid project pictures that good bit of bondo and some minor custom metal fab pieces are needed. To make the fitment perfect. I wonder what they were talking about. Well if anyone knows different let me know or I will probably find out the hard way in a few months.
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Re: Simple question for a complicated 70-73 front to fit on a 77-78
« Reply #4 on: January 21, 2012, 05:10:59 PM »

Clint S

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Re: Simple question for a complicated 70-73 front to fit on a 77-78
« Reply #5 on: January 21, 2012, 06:52:39 PM »
Do a search there are plenty of threads on this.     This is only the difference in the fenders.   See where the little circle is  it is a small bracket where the valance bolts.


The fender lip under the hood is cosmetically different in the early years , but that wont matter and there  some holes in the front lip of the fender where the bumper bolts on the later year fenders, but again that is covered up.   You need the brackets that bolt to the frame, the valance, hood and associated wiring.
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79_T/A_guy

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Re: 70-73 conversion advice
« Reply #6 on: January 23, 2012, 06:36:14 AM »
Well thanks for all the information, I suppose now I am curious what the best way to do this is or which way looks the best.
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Black Sheep

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Re: Simple question for a complicated 70-73 front to fit on a 77-78
« Reply #7 on: January 23, 2012, 11:14:29 AM »
I have read several places with no mid project pictures that good bit of bondo and some minor custom metal fab pieces are needed. To make the fitment perfect. I wonder what they were talking about.

I think I read on here somewhere that the nose piece on the 70-73 cars didn't fit perfectly against the fenders from the factory, and when people do the conversion they try to make it perfect, hence the fab and bondo work.

I could be totally wrong, too. :lol:
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LeighP

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Re: 70-73 conversion advice
« Reply #8 on: January 24, 2012, 06:35:31 AM »
The book shows the 70-73 nose sits against the fenders with a 0 to 0.015" (I'm pretty sure thats right) clearance.
In other words, it can be up tight to the fender, or spaced just a touch off. My body guy had a thought about it, and he is spacing my 71's nose just slightly off the fenders so theres no chance of he nose vibrating against the fenders and rubbing/chipping at the fresh paint.
I agreed with his decision.
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Leigh

Sydney, Australia
1969 Pontiac Firebird 400 coupe (project)

Former Firebirds -
1971 Pontiac Firebird 455
1977 Pontiac Trans Am
1976 Pontiac Trans Am
1967 Pontiac Firebird 400 convertible
1967 Pontiac Firebird 400 coupe


Black Sheep

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Re: 70-73 conversion advice
« Reply #9 on: January 24, 2012, 11:16:37 AM »
455 Olds/Th350,3.90
11.05
121 mph
1.46 60'
3125lbs.

geosecor

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Re: 70-73 conversion advice
« Reply #10 on: January 26, 2012, 10:43:05 PM »
i put 1976 T/A fenders on mine-  epoxied the 70-73 brackets into front fenders- found an older style shaker hood pre 76 i think  and a 70-73 nose cone and lower valance panel and frame brackets- although my car war a 1970 firebird- now a T/A clone- i bet all my front end pieces would mount and line up on your car without a problem-  Good luck- they look cool- i spent a small fortune finding parking lights and finishing items.
Geosecor
1970 Firebird - Trans Am Frankenstein II
1976 Carousel Red T/A- sold as a project
1978 Trans Am Blackbird- Restored Frankenstein- Sold
1978 Brown T/A parts car- crushed
1981 Firebird Esprit- Sold
1980 Z28- Restored- Sold

Re: 70-73 conversion advice
« Reply #10 on: January 26, 2012, 10:43:05 PM »
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